Hello all ,
This is my first post on this forum Thank you (newbie ).
I need an advice on how to completely resolve this problem .
The service manual says E-501 is an interlock switch failure "check fuses F1(1.0A) & F14 (2.5A)
on the EC board . Checks on this board showed that +24v is available on the EC(engine control ) board
but F14 was blown . Fuse listings in the manual defined F14 as "all fans harness short ".
All cooling fans on the copier were checked and found to be okay .
The EC board was checked and F14 was replaced, E-501 cleared and copier was okay.
However after about an hour , E-501 showed up again . F14 was blown!
This time around , the power mosfet J598 on the EC board was "shorted "
Could "all fans harness short " mean a bad EC board or the cooling fan harness wiring is bad ?
I dont want to fit a new engine control board that will damaged if I am not certain all issues have been resolved
Thanks .
This is my first post on this forum Thank you (newbie ).
I need an advice on how to completely resolve this problem .
The service manual says E-501 is an interlock switch failure "check fuses F1(1.0A) & F14 (2.5A)
on the EC board . Checks on this board showed that +24v is available on the EC(engine control ) board
but F14 was blown . Fuse listings in the manual defined F14 as "all fans harness short ".
All cooling fans on the copier were checked and found to be okay .
The EC board was checked and F14 was replaced, E-501 cleared and copier was okay.
However after about an hour , E-501 showed up again . F14 was blown!
This time around , the power mosfet J598 on the EC board was "shorted "
Could "all fans harness short " mean a bad EC board or the cooling fan harness wiring is bad ?
I dont want to fit a new engine control board that will damaged if I am not certain all issues have been resolved
Thanks .
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